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Add error handling to backend creation
This commit adds two error-handling cases to the function attempt_dmr_backend. Specifically: - In the case where the number of found GPUs is zero, we now print a log message indicating this and return a NULL pointer - In the case where we could not successfully create a backend on any GPU, we now log a message indicating this and return a NULL pointer This allows us to provide more descriptive error messages, as well as avoid a SEGFAULT (the function `ensure_primary_backend_renderer_and_allocator` dereferences the pointer given, which could be NULL until this patch) when these cases arise.
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8e34692250
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1 changed files with 10 additions and 1 deletions
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@ -293,7 +293,12 @@ static struct wlr_backend *attempt_drm_backend(struct wl_display *display,
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return NULL;
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}
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wlr_log(WLR_INFO, "Found %zu GPUs", num_gpus);
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if (num_gpus == 0) {
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wlr_log(WLR_ERROR, "Found 0 GPUs, cannot create backend");
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return NULL;
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} else {
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wlr_log(WLR_INFO, "Found %zu GPUs", num_gpus);
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}
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struct wlr_backend *primary_drm = NULL;
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for (size_t i = 0; i < (size_t)num_gpus; ++i) {
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@ -310,6 +315,10 @@ static struct wlr_backend *attempt_drm_backend(struct wl_display *display,
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wlr_multi_backend_add(backend, drm);
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}
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if (!primary_drm) {
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wlr_log(WLR_ERROR, "Could not successfully create backend on any GPU");
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return NULL;
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}
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return ensure_backend_renderer_and_allocator(primary_drm);
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}
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